Cortana is a Windows phone virtual assistant that’s using an algorithm from Bing Predicts to pick every game of the NFL season. After making headlines at the World Cup by correctly predicting 15 of the tournament’s final 16 games, it’s having a harder time picking NFL games.

The algorithm picks games straight up, not against the point spread. Its record is one game better than the Vegas favourites (which are 125-64-3, 65.1%) and a few games worse than Nate Silver’s ELO model (which is 132-60, 68.8%).

After getting two out of the three Thanksgiving games wrong, Cortana made a comeback and went 9-4 on Sunday and Monday. Vegas favourites also finished the week 10-6, and ELO went 9-7.